I In Cardano's formula...

  • Thread starter Terrell
  • Start date
317
25
in Cardano's cubic formula. when reducing a cubic to its depressed form: from ax^3 + bx^2 + cx + d = 0 to a form like y^3 +py + q = 0. what is the motivation behind making x = y - b/3a first before proceeding to depress the cubic? what was cardano's motivation for that substitution or whoever showed him that technique?
 
317
25
okay i'll think about it first
so i noticed that inflection points is equal to -b/3a but i'm not sure if that meant anything at all. still thinking and researching
 

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